Automatized sequential reaction unit for aerobic particle sludge culture and research

An aerobic granular sludge, sequencing batch reaction technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. Influence of culture conditions and other issues to achieve the effect of satisfying temperature requirements and simple and easy operation

Inactive Publication Date: 2007-05-23
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the common automated sequencing batch experimental device is not for the purpose of cultivating granular sludge and studying the characteristics of granular sludge, and does not consider the influence of cultivation conditions on the formation of particles, it is not suitable for experimental research with granular sludge as the research object. , even if some can form granular sludge, the required cultivation time is quite long, and some can reach more than half a year, wasting a lot of manpower and material resources
At present, there is no reactor for the purpose of cultivating granular sludge and using granular sludge for scientific research.

Method used

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  • Automatized sequential reaction unit for aerobic particle sludge culture and research
  • Automatized sequential reaction unit for aerobic particle sludge culture and research
  • Automatized sequential reaction unit for aerobic particle sludge culture and research

Examples

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Effect test

Embodiment 1

[0029] Example 1: Simultaneous nitrification and denitrification of aerobic granular sludge

[0030] (a) Use aerobic granular sludge as inoculation sludge to maintain the mixed liquid suspended solids concentration (MLSS) in the reactor main body 26 at 6.7g / L; (b) select the operating parameters as follows: water inflow and drainage are about 3 minutes respectively and for about 5 minutes, aeration for 240 minutes, precipitation for 2 minutes, and anaerobic treatment for 30 minutes; (c) The temperature of the constant temperature water bath was set at 20°C, the aeration rate was 75L / h, and the chemical oxygen demand (COD) of the influent was maintained. Cr ) and ammonia nitrogen concentrations are 420mg / L and 30mg / L respectively, and run 3 cycles every day; (d) after the operation starts, the simulated wastewater enters the reactor main body 26 through the lifting effect of the water pump 12, and under the action of the control system, the After aeration, sedimentation, draina...

Embodiment 2

[0031] Embodiment 2: the cultivation of aerobic granular sludge

[0032] (a) Ordinary flocculent sludge is used as inoculation sludge, and the MLSS in the reactor is maintained at 2.7g / L; (b) The operating parameters are selected as follows: water inflow and drainage are about 3 minutes and 5 minutes respectively, aeration is 240 minutes, sedimentation The time is set to more than 30 minutes at the beginning, and the sedimentation time is artificially shortened gradually with the extension of the acclimatization time, and the selective cultivation of granular sludge is accelerated by reducing the sludge sedimentation time, and the anaerobic time is 30 minutes; (c) The temperature of the constant temperature water bath is set to 20 °C , the aeration rate is 75L / h, and the influent COD is maintained Cr and ammonia nitrogen concentrations are 420mg / L and 30mg / L respectively, and run 3 cycles per day; (d) after the operation starts, the simulated wastewater enters the reactor main...

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Abstract

The invention relates to automatic batch reaction equipment for research and development of aerobic grain sludge. It includes main body of reactor, mixing system, aeration system and control system. The length-diameter ratio of reactor is over 10. In the main body or the reactor, there are infalls, sample connection, outfalls and sludge outlet whose make and break can be controlled by system. The mixing system is set in lumen of reactor's main body. Connecting with fan and nitrogen system controlled by control system through air conduit, micro pores of aeration system are set at the bottom. At the middle-down of main body of reactor, there is a heating system which includes a heating jacket. In the heating jacket there are infall and outfall connecting with water pump and homothermal hot water source. Using the invention, grain sludge can be formed quickly, at the same time, it can realize research, development nitration, denitrify and dephosphorization using denitrify of grain sludge. Its operation is simple and feasible.

Description

Technical field: [0001] The invention relates to an experimental device in the field of wastewater biological treatment, in particular to an automatic sequencing batch reaction device for aerobic granular sludge cultivation and research. Background technique: [0002] The use of aerobic granular sludge to remove various harmful substances in wastewater is a research hotspot in the field of wastewater biological treatment in recent years. Compared with ordinary flocculent activated sludge, granular sludge has better settling performance, higher sludge concentration, and is more able to adapt to sudden changes in wastewater quality. And through a certain directional cultivation, granular sludge can not only remove organic matter in wastewater, but also realize simultaneous nitrification and denitrification, phosphorus removal and removal of refractory organic matter. Therefore, using the nitrogen and phosphorus removal ability of granular sludge to solve the eutrophication pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 谢珊李小明曾光明杨麒
Owner HUNAN UNIV
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